铸造2017，Vol.66Issue(11)：1155-1158,4.
微量锆对铸态A356铝合金组织和性能的影响
Effect of Trace Zr on the Microstructure and Mechanical Properties of As-Cast A356 Aluminum Alloys
摘要
Abstract
The influence of trace Zr element on the microstructure and mechanical properties of A356 aluminum alloys was studied. It can be achieved thatα-Al dendrites can be refined after adding 0.05%-0.25% Zr into the melt, and the best refining efficiency is obtained when 0.15%-0.25% Zr is added. Besides, the distribution of eutectic silicon is improved. Microstructural of alloy was analyzed by SEM. The result indicates that blocky intermetallic compounds containing Zr element are formed and Zr element is mainly distributed along the grain boundaries. Trace Zr addition is benefit to improvement of the yiled strength, ultimate tensile strength, elongation percentage, and Brinell hardness.关键词
A356合金/晶粒细化/微量Zr/力学性能Key words
A356 alloy/grain refinement/trace Zr content/mechanical property分类
矿业与冶金引用本文复制引用
夏峰,梁民宪,郭永春,李建平,颜均衡,朱海龙..微量锆对铸态A356铝合金组织和性能的影响[J].铸造,2017,66(11):1155-1158,4.基金项目
国家基础研究项目(61322401). （61322401）
